Hi,
we have a web server with two apache instances running on that. Experiencing
high load on server and the "top" shows httpd's taking CPU. The httpd.conf
worker setting is -
<IfModule worker.c>
#ServerLimit 25
StartServers 2
MaxClients 300
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestsPerChild 20000
</IfModule>
Looking at server resources, we dont find any memory issue & no swapping
seen. the "vmstat" output shows that the run queue("r") increases higher
thatn the number of CPU's on the server. Server has 2 dual Core Intel(R)
Xeon(TM) CPU 3.06GHz.
I feel since processes are going in CPU run queue it may happen apache is
not tunned properly to handle requests though we dont see any crunch on
server resources.
Any suggestions?
Also i would like to know the thumb rule calculations for
configuring/tunning worker threads i..e how to decide on values for
ServerLimit, Maxclient, Minspare threads ect etc.
Thanks in advance
Kulbir
